CN108730462A - A kind of totally enclosed type straight line module - Google Patents

A kind of totally enclosed type straight line module Download PDF

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Publication number
CN108730462A
CN108730462A CN201810567682.2A CN201810567682A CN108730462A CN 108730462 A CN108730462 A CN 108730462A CN 201810567682 A CN201810567682 A CN 201810567682A CN 108730462 A CN108730462 A CN 108730462A
Authority
CN
China
Prior art keywords
steel plate
retainer
seal steel
pedestal
transmission
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN201810567682.2A
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Chinese (zh)
Inventor
黄德成
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Dongguan Heath Drive Technology Co Ltd
Original Assignee
Dongguan Heath Drive Technology Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Dongguan Heath Drive Technology Co Ltd filed Critical Dongguan Heath Drive Technology Co Ltd
Priority to CN201810567682.2A priority Critical patent/CN108730462A/en
Publication of CN108730462A publication Critical patent/CN108730462A/en
Pending legal-status Critical Current

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Classifications

    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16HGEARING
    • F16H25/00Gearings comprising primarily only cams, cam-followers and screw-and-nut mechanisms
    • F16H25/18Gearings comprising primarily only cams, cam-followers and screw-and-nut mechanisms for conveying or interconverting oscillating or reciprocating motions
    • F16H25/20Screw mechanisms
    • F16H25/22Screw mechanisms with balls, rollers, or similar members between the co-operating parts; Elements essential to the use of such members
    • F16H25/2204Screw mechanisms with balls, rollers, or similar members between the co-operating parts; Elements essential to the use of such members with balls
    • F16H25/2209Screw mechanisms with balls, rollers, or similar members between the co-operating parts; Elements essential to the use of such members with balls with arrangements for taking up backlash
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16HGEARING
    • F16H25/00Gearings comprising primarily only cams, cam-followers and screw-and-nut mechanisms
    • F16H25/18Gearings comprising primarily only cams, cam-followers and screw-and-nut mechanisms for conveying or interconverting oscillating or reciprocating motions
    • F16H25/20Screw mechanisms
    • F16H2025/2062Arrangements for driving the actuator
    • F16H2025/2081Parallel arrangement of drive motor to screw axis

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Transmission Devices (AREA)

Abstract

The present invention relates to Linear transmission technical fields, more particularly to a kind of totally enclosed type straight line module, including pedestal, it is set to the drive component of pedestal one end, it is set to chassis interior and drives the transmission parts being connected with drive component, it is movably set in the retainer of transmission parts, the pedestal is located at retainer and is provided with seal steel plate on one side, the pedestal is provided at both ends with pressing plate and seal steel plate is fixed on susceptor surface, the susceptor surface is provided with locating slot, the locating slot is provided with rib, rib side is provided with magnet to adsorb seal steel plate, the seal steel plate penetrates retainer, setting lever erects seal steel plate inside the retainer, the retainer, which is located at lever both sides and is provided with roll shaft, suppresses seal steel plate;Seal steel plate is adsorbed by the effect of setting locating slot and magnet adsorption and realizes sealing transmission by the present invention, it is ensured that in high efficiency transmission process, seal steel plate holding stable drive, transmission efficiency, stability is good, and sealing intensity is high.

Description

A kind of totally enclosed type straight line module
Technical field
The present invention relates to Linear transmission technical fields, more particularly to a kind of totally enclosed type straight line module.
Background technology
Mechanical (English name:Machinery) refer to machine and mechanism general name.Machinery is exactly that people can be helped to reduce work Difficulty or labour-saving tool device, as the article of chopsticks, broom and tweezers one kind can be said to machinery, they are simple Machinery.And complicated machinery is exactly to be made of the simple and mechanical of two or more.Usually these more complicated machineries Make machine.From the viewpoint of structure and movement, mechanism and machine and indistinction are loosely referred to as machinery, in nonstandard machine equipments, extensively The general straight line module that used realizes Linear transmission work.
Straight line module usually has several calls, such as linear module, Cartesian robot, straight line slide unit etc., is after straight The automatic updating unit of line guide rail, ball screw linear transmission mechanism.Straight line module can be real by the combination of each unit The straight line that now loads, curvilinear motion, make that the automation gently loaded is more flexible, positioning is more accurate.It was driven in straight line module Cheng Zhong needs to realize driving protection to internal transmission part, prevents internal drive mechanism from entering the entrance of the objects such as dust clast and leads Cause internal structure failure or damage.
In the prior art, China Patent No. CN201620960938.2, disclose a kind of rubber weather strip draws material dress It sets, including workbench, connecting rod is installed, the connecting rod is equipped with straight line module and dress buckle mechanism, described straight on the workbench Line module front end is equipped with servo motor, and rear end is equipped with the second traction material folding cylinder, and the front end of the connecting rod is equipped with a holder, There is cutter mechanism on the holder, the junction of the connecting rod and holder is equipped with the first traction material folding cylinder, first traction Material folding cylinder is placed between cutter mechanism and dress buckle mechanism.Rubber weather strip of the present invention draws material device by by the first haulage clip Expect that cylinder is arranged between connecting rod and holder, material folding cylinder coordinates to draw to surmount by rubber weather strip with straight line module and cut when work Knife is effectively prevented rubber weather strip accumulation and squeezes and reduce the loss of rubber weather strip, and can improve adding for rubber weather strip Work dimensional accuracy;Secondly, the synchronism of rubber weather strip drawn material device and ensure each process work, improves work efficiency;Its Existing deficiency is, is realized and is sealed using sealing strip, plays protection to internal structure, but seal steel band in transmission process and hold It easily upwarps, causes sealing effect bad, the problems such as transmission efficiency is low, and stability is poor exists.
Invention content
To solve the above problems, the present invention provides a kind of effect by the way that locating slot and magnet adsorption is arranged, steel will be sealed Sealing transmission is realized in piece absorption, it is ensured that in high efficiency transmission process, seal steel plate holding stable drive, and transmission efficiency, Stability is good, the high totally enclosed type straight line module of sealing intensity.
The technical solution adopted in the present invention is:A kind of totally enclosed type straight line module, including pedestal, are set to pedestal one end Drive component, be set to chassis interior and drive component and drive the transmission parts being connected, be movably set in the biography of transmission parts Dynamic seat, the pedestal are located at retainer and are provided with seal steel plate on one side, and the pedestal is provided at both ends with pressing plate and consolidates seal steel plate It is scheduled on susceptor surface, the susceptor surface is provided with locating slot, and the locating slot is provided with rib, is provided with positioned at rib side Magnet adsorbs seal steel plate, and the seal steel plate penetrates retainer, and lever is arranged inside the retainer by seal steel plate frame It rises, the retainer, which is located at lever both sides and is provided with roll shaft, suppresses seal steel plate.
Further improvement of these options is that the pedestal is that proximate matter is integrally formed by squeezing, and both sides are provided with Mounting groove, both ends are installed with fixed seat and connecting seat respectively, and the driving component is set to connecting seat and is driven with transmission parts It is dynamic to be connected.
Further improvement of these options is that the locating slot and pedestal one extrusion forming, the baffle plate setting exist The convex setting of locating slot marginal position, the magnet insertion positioning groove bottom.
Further improvement of these options is that the driving component is arranged for servo motor.
Further improvement of these options is that the transmission parts include the guide rail for being installed on chassis interior, and transmission is set It is the drive seat of guide rail, be arranged in drive seat and drives the lead screw being connected, the retainer to be fixedly installed in drive component Drive seat.
Further improvement of these options is that the retainer includes the mounting base being fixedly linked with drive seat, described Lever is set up in mounting base with roll shaft, and the mounting base side is provided with sensing chip, and the mounting groove is provided with and sensing chip The inductor of mutual induction transmission.
Further improvement of these options is that the retainer both sides are provided with block, is located at lever and roll shaft top It is fixed with protection cap.
Further improvement of these options is that the lever is equipped with idler wheel with roll shaft, and the idler wheel is plastic shaft Hold setting.
Beneficial effects of the present invention are:
In a first aspect, being equipped with pedestal, fixed installation is integrally played the role of to straight line module by pedestal, while to internal junction Structure plays a protective role, and practicability is stronger, is set to the drive component of pedestal one end, is set to chassis interior and is driven with drive component Connected transmission parts are moved, the retainer of transmission parts is movably set in, transmission parts band is driven particular by drive component Dynamic retainer realizes Linear transmission effect, and transmission effect is good, high transmission accuracy;Second aspect, the pedestal are located at retainer one Face is provided with seal steel plate, and the pedestal is provided at both ends with pressing plate and seal steel plate is fixed on susceptor surface, passes through seal steel plate Play the role of seal protection to the transmission parts of chassis interior installation, prevents straight line module is internal in transmission process from entering dust The objects such as clast lead to failure or the damage of internal structure, and sealing effect is good, is greatly improved transmission accuracy and efficiency;Third party Face, the susceptor surface are provided with locating slot, and the locating slot is provided with rib, particular by the effect of locating slot and baffle Seal steel plate is located in the designated position of susceptor surface, prevents the seal steel plate in transmission process from shaking, can further function as Seal protection acts on, and improves transmission efficiency and precision;Fourth aspect is provided with magnet positioned at rib side and inhales seal steel plate It is attached, seal steel plate is adsorbed by magnet, seal steel plate and the locating slot of susceptor surface pass through magnet adsorption in transmission process Fit-state is formed, can ensure in transmission process seal steel plate not alice, height is reached in the case where ensureing transmission efficiency Sealing effect;5th aspect, the seal steel plate penetrate retainer, and lever is arranged inside the retainer by seal steel plate frame It rises, the retainer, which is located at lever both sides and is provided with roll shaft, suppresses seal steel plate, the seal steel plate specifically in transmission process Retainer is penetrated, retainer connection driving load ensures that retainer can in transmission process by the effect of lever and roll shaft Stable drive, high transmission accuracy, stability are good.
In the present invention, by the way that the effect of locating slot and magnet adsorption is arranged, seal steel plate is adsorbed and realizes sealing transmission, it can Ensure in high efficiency transmission process, seal steel plate keeps stable drive, and transmission efficiency, stability is good, and sealing intensity is high.
Description of the drawings
Fig. 1 is the stereoscopic schematic diagram of straight line module of the present invention;
Fig. 2 is the backsight diagrammatic cross-section of straight line module of the present invention;
Fig. 3 is the side elevational cross-section schematic diagram of straight line module of the present invention.
Description of drawing identification:Straight line module 100, pedestal 110, pressing plate 111, locating slot 112, rib 113, magnet 114, peace Tankage 115, fixed seat 116, connecting seat 117, drive component 120, transmission parts 130, guide rail 131, drive seat 132, lead screw 133, retainer 140, lever 141, roll shaft 142, mounting base 143, sensing chip 144, inductor 145, block 146, protection cap 147, idler wheel 148, seal steel plate 150.
Specific implementation mode
Below in conjunction with attached drawing, the present invention is further illustrated.
As shown in FIG. 1 to 3, the stereoscopic schematic diagram of straight line module respectively of the present invention and the signal of the section of different visual angles Figure.
A kind of totally enclosed type straight line module 100, including pedestal 110, are set to the drive component 120 of 110 one end of pedestal, if It is placed in 110 inside of pedestal and drives the transmission parts 130 being connected with drive component 120, be movably set in the transmission of transmission parts 130 Seat 140, the pedestal 110 is located at retainer 140 and is provided with seal steel plate 150 on one side, and the pedestal 110 is provided at both ends with pressing plate Seal steel plate 150 is fixed on 110 surface of pedestal by 111, and 110 surface of the pedestal is provided with locating slot 112, the locating slot 112 are provided with rib 113, and 113 side of rib, which is provided with magnet 114, adsorbs seal steel plate 150, the seal steel plate 150 penetrate retainer 140, and 140 inside setting lever 141 of the retainer erects seal steel plate 150, the retainer 140 141 both sides of lever are provided with roll shaft 142 to suppress seal steel plate 150.
Pedestal 110 is that proximate matter is integrally formed by squeezing, and is integrally formed using squeezing, and manufacturing cost is low, good forming effect, Ability of anti-deformation is strong, is suitble to big stroke transmission setting, integraty is strong, is greatly improved transmission accuracy, and both sides are provided with installation Slot 115, by mounting groove 115 can installing component fix use, easy for installation, both ends are installed with 116 He of fixed seat respectively Connecting seat 117, the driving component 120 are set to connecting seat 117 and are connected with the driving of transmission parts 130, pass through 116 He of fixed seat Connecting seat 117 plays fixed protective effect to the both ends of pedestal 110 respectively, can be convenient for drive component 120 by connecting seat 117 It is fixedly mounted, easy for installation, driving effect is good.
Drive component 120 is arranged for servo motor, is driven using servo motor, it can be achieved that PLC intelligent controls, are automating Intelligent control driving is realized in equipment, driving effect is good, high degree of automation.
Transmission parts 130 include the guide rail 131 being installed on inside pedestal 110, and transmission is located in the drive seat of guide rail 131 132, it is arranged in drive seat 132 and drives the lead screw 133 being connected, the retainer 140 to be fixedly installed in drive with drive component 120 Dynamic seat 132 drives drive seat 132 along the realization Linear transmission of guide rail 131 particular by servo motor driving lead screw 133, and Being fixedly linked by drive seat 132 and retainer 140 in transmission process, thus drive retainer 140 in 110 surface of pedestal reality Existing Linear transmission, transmission effect is good, and stability is good, and precision is high.
Retainer 140 includes the mounting base 143 being fixedly linked with drive seat 132, the lever 141 and 142 equal frame of roll shaft Set on mounting base 143, it is fixedly connected with drive seat 132 by mounting base 143, it is easy for installation, while being convenient for lever 141 and roll shaft 142 setting, good connecting effect improve the stability of transmission.
143 side of mounting base is provided with sensing chip 144, and the mounting groove 115 is provided with to be passed with 144 mutual induction of sensing chip Dynamic inductor 145, setting sensing chip 144 cooperates with inductor 145 realizes intelligent control transmission, can be in automation equipment Upper use, easy to use, transmission effect is good, and efficient, stability is strong.
140 both sides of retainer are provided with block 146, are fixed with protection cap 147 positioned at lever 141 and 142 top of roll shaft, lead to Suppression can be played by seal steel plate 150 by crossing block 146, be played to internal lever 141 and roll shaft 142 by protection cap 147 Protective effect, safe to use, stability is good, and sealing effect is good.
Lever 141 is equipped with idler wheel 148 with roll shaft 142, and the idler wheel 148 is arranged for plastic bearing, and idler wheel 148 is arranged Idler wheel 148 and seal steel plate can be greatly reduced in addition, setting idler wheel 148 to plastic bearing by improving transmission effect and stability Friction coefficient between 150 is greatly improved service life and transmission effect.
In actual use, seal steel plate 150 corresponds to magnet one side position and is provided with step, the stepped locations and magnet Absorption setting, the center for being located at step one side are arranged towards 110 internal protrusion of pedestal, are greatly improved suction-operated, to Improve sealing effect.
In a first aspect, being equipped with pedestal 110, play the role of fixed installation by the way that pedestal 110 is whole to straight line module 100, together When play a protective role to internal structure, practicability is stronger, is set to the drive component 120 of 110 one end of pedestal, is set to pedestal 110 inside drive the transmission parts 130 being connected with drive component 120, are movably set in the retainer 140 of transmission parts 130, have Body is to drive transmission parts 130 that retainer 140 is driven to realize Linear transmission effect by drive component 120, and transmission effect is good, passes Dynamic precision is high;Second aspect, the pedestal 110 are located at retainer 140 and are provided with seal steel plate 150,110 liang of the pedestal on one side End is provided with pressing plate 111 and seal steel plate 150 is fixed on 110 surface of pedestal, is pacified to 110 inside of pedestal by seal steel plate 150 The transmission parts 130 of dress play the role of seal protection, prevent straight line module 100 is internal in transmission process from entering dust clast etc. Object leads to failure or the damage of internal structure, and sealing effect is good, is greatly improved transmission accuracy and efficiency;The third aspect, it is described 110 surface of pedestal is provided with locating slot 112, and the locating slot 112 is provided with rib 113, particular by locating slot 112 and gear Seal steel plate 150 is located in the designated position on 110 surface of pedestal by the effect of plate, prevents seal steel plate 150 in transmission process It shakes, seal protection effect can be further functioned as, improve transmission efficiency and precision;Fourth aspect is located at 113 side of rib and is arranged There is magnet 114 to adsorb seal steel plate 150, is adsorbed seal steel plate 150 by magnet 114, the seal steel plate in transmission process 150 form fit-state with the locating slot 112 on 110 surface of pedestal by the absorption of magnet 114, can ensure close in transmission process The not alice of steel disc 150 is sealed, reaches high sealing effect in the case where ensureing transmission efficiency;5th aspect, the seal steel plate 150 Retainer 140 is penetrated, 140 inside setting lever 141 of the retainer erects seal steel plate 150, and the retainer 140 is located at 141 both sides of lever are provided with roll shaft 142 and suppress seal steel plate 150, and seal steel plate 150 penetrates biography specifically in transmission process Dynamic seat 140, the connection driving load of retainer 140, ensures transmission in transmission process by the effect of lever 141 and roll shaft 142 Seat 140 can stable drive, high transmission accuracy, stability is good.
In the present invention, the effect adsorbed by the way that locating slot 112 and magnet 114 is arranged is realized the absorption of seal steel plate 150 close Envelope transmission, it is ensured that in high efficiency transmission process, seal steel plate 150 keeps stable drive, and transmission efficiency, stability is good, Sealing intensity is high.
Several embodiments of the invention above described embodiment only expresses, the description thereof is more specific and detailed, but simultaneously Cannot the limitation to the scope of the claims of the present invention therefore be interpreted as.It should be pointed out that for those of ordinary skill in the art For, without departing from the inventive concept of the premise, various modifications and improvements can be made, these belong to the guarantor of the present invention Protect range.Therefore, the protection domain of patent of the present invention should be determined by the appended claims.

Claims (8)

1. a kind of totally enclosed type straight line module, it is characterised in that:Including pedestal, it is set to the drive component of pedestal one end, is arranged The transmission parts being connected are driven with drive component in chassis interior, are movably set in the retainer of transmission parts, the pedestal position It is provided with seal steel plate on one side in retainer, the pedestal is provided at both ends with pressing plate and seal steel plate is fixed on susceptor surface, institute It states susceptor surface and is provided with locating slot, the locating slot is provided with rib, and magnet is provided with by seal steel plate positioned at rib side Absorption, the seal steel plate penetrate retainer, and setting lever erects seal steel plate inside the retainer, the transmission seat Lever both sides are provided with roll shaft to suppress seal steel plate.
2. a kind of totally enclosed type straight line module according to claim 1, it is characterised in that:The pedestal is proximate matter by squeezing Pressure is integrally formed, and both sides are provided with mounting groove, and both ends are installed with fixed seat and connecting seat respectively, and the driving component is set Connecting seat is placed in transmission parts driving to be connected.
3. a kind of totally enclosed type straight line module according to claim 2, it is characterised in that:The locating slot and pedestal one Extrusion forming, the baffle plate setting is in the convex setting of locating slot marginal position, the magnet insertion positioning groove bottom.
4. a kind of totally enclosed type straight line module according to claim 3, it is characterised in that:The driving component is servo electricity Machine is arranged.
5. a kind of totally enclosed type straight line module according to claim 4, it is characterised in that:The transmission parts include installation In the guide rail of chassis interior, transmission is located at the drive seat in guide rail, is arranged in drive seat and drives the silk being connected with drive component Bar, the retainer are fixedly installed in drive seat.
6. a kind of totally enclosed type straight line module according to claim 5, it is characterised in that:The retainer includes and driving The mounting base that seat is fixedly linked, the lever are set up in mounting base with roll shaft, and the mounting base side is provided with sensing chip, institute It states mounting groove and is provided with the inductor being driven with sensing chip mutual induction.
7. a kind of totally enclosed type straight line module according to claim 6, it is characterised in that:The retainer both sides are provided with Block is fixed with protection cap positioned at lever and roll shaft top.
8. a kind of totally enclosed type straight line module according to claim 7, it is characterised in that:The lever is worn with roll shaft There are idler wheel, the idler wheel to be arranged for plastic bearing.
CN201810567682.2A 2018-06-05 2018-06-05 A kind of totally enclosed type straight line module Pending CN108730462A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201810567682.2A CN108730462A (en) 2018-06-05 2018-06-05 A kind of totally enclosed type straight line module

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201810567682.2A CN108730462A (en) 2018-06-05 2018-06-05 A kind of totally enclosed type straight line module

Publications (1)

Publication Number Publication Date
CN108730462A true CN108730462A (en) 2018-11-02

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CN201810567682.2A Pending CN108730462A (en) 2018-06-05 2018-06-05 A kind of totally enclosed type straight line module

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109467029A (en) * 2018-12-28 2019-03-15 芜湖金三氏数控科技有限公司 A kind of slide unit lifting device
CN109707814A (en) * 2019-01-25 2019-05-03 深圳市锐健电子有限公司 A kind of novel ball screw device

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105082126A (en) * 2015-09-02 2015-11-25 浙江斯凯瑞机器人股份有限公司 High-speed mute full-closed right-angle coordinate mechanical arm
CN204872552U (en) * 2015-03-12 2015-12-16 天津海特传动机械有限公司 Novel linear module HTBS series
CN206092696U (en) * 2016-08-28 2017-04-12 江门市天功自动化科技有限公司 Sealed integral sharp module
CN206561277U (en) * 2017-02-27 2017-10-17 中村精机无锡有限公司 A kind of totally-enclosed dust-proof electric cylinders
CN206582238U (en) * 2017-01-17 2017-10-24 东莞市锐翼智能装备有限公司 A kind of protection cap and the straight line module comprising this protection cap
CN207297781U (en) * 2017-10-23 2018-05-01 浙江台诠机器人有限公司 A kind of straight line module of screw drive

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN204872552U (en) * 2015-03-12 2015-12-16 天津海特传动机械有限公司 Novel linear module HTBS series
CN105082126A (en) * 2015-09-02 2015-11-25 浙江斯凯瑞机器人股份有限公司 High-speed mute full-closed right-angle coordinate mechanical arm
CN206092696U (en) * 2016-08-28 2017-04-12 江门市天功自动化科技有限公司 Sealed integral sharp module
CN206582238U (en) * 2017-01-17 2017-10-24 东莞市锐翼智能装备有限公司 A kind of protection cap and the straight line module comprising this protection cap
CN206561277U (en) * 2017-02-27 2017-10-17 中村精机无锡有限公司 A kind of totally-enclosed dust-proof electric cylinders
CN207297781U (en) * 2017-10-23 2018-05-01 浙江台诠机器人有限公司 A kind of straight line module of screw drive

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109467029A (en) * 2018-12-28 2019-03-15 芜湖金三氏数控科技有限公司 A kind of slide unit lifting device
CN109707814A (en) * 2019-01-25 2019-05-03 深圳市锐健电子有限公司 A kind of novel ball screw device

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Application publication date: 20181102